基本调通了，但是还是返回格式错误，可否指点下。

{

"code": 1002,

"msg": "校验返回数据格式时发生错误，你返回的数据必须符合文档规定的格式，错误信息：invalid character '«' looking for beginning of value",

"requestId": "9668575759",

"data": "null",

"rid": "7c8261b8"

}

        {  

            "answer_type": "text",  

            "text_info": {  

                "short_answer": "answer"  

            }  

        }  

        """

    aes_resp = AESUtil.encrypt(resp)

    print("Encrypted:", aes_resp)

    body = AESUtil.decrypt(aes_resp)

    print("Decrypted:", body)

Encrypted: gz1HcbCGPTWd0pf4pdn1X/Kt40uB8YneFHDLeS0uwOACdKu4/wiJJZRQZBXjx97Z7pNCpBhMvA44wP2F3084II348GUkqaTEhXpJwWypW6y/v1ZAsWiPlyYYwMUkMvaO4jUbKhofDyUSybIq+GO5cKGrdgzstniaS/dyGf6UoKqBO+c5mwzZsKU1s5z4jVdC6unKUs77lEHy5gO4ValLoVvf0wwkNnElegWCk/+LJoHgwWctq0vO8N0UHweGqSjW

Decrypted:   

        {  

            "answer_type": "text",  

            "text_info": {  

                "short_answer": "answer"  

            }  

        }